Air Temperature and Density
This activity will demonstrate that cold air is more dense than
warmer air and will be drawn to the bottom of a container by the force
Time requirement: 30 minutes as an activity, 20 minutes as a demonstration.
- Fish tank with lid
- 3 thermometers
- Scotch tape
- Tape the three thermometers inside one end of the tank. Tape one near
the top, one in the middle, and one at the bottom of the tank.
- Place a large quantity of ice in the other end of the tank.
- Place the lid on the tank.
- Observe the temperature of the three thermometers.
- What were the three temperatures before the ice was added to the tank?
- Which thermometer first indicated a change in temperature? Why???
- Why are there different temperatures in the tank? Which thermometer
recorded the coldest temperature and which recorded the warmest
- What makes the cold air sit in the bottom of the tank?
- What will have to happen so that the three thermometers once again
record the same temperature?
Last updated: August 27, 1997
Joe Twicken /